July 28, 2016, 11:51 a.m. (ET)

At the 2016 U.S. Olympic Team Trials for Swimming, first-time Olympians and veteran swimmers dominated the pool, making for a good mix of contenders who are headed to Rio. Check out some of the best photos from the competition.

1) Michael Phelps
Michael Phelps reacts after winning the final heat for the men's 200-meter butterfly at the 2016 U.S. Olympic Team Trials for Swimming at CenturyLink Center on June 29, 2016 in Omaha, Neb.

2) Katie Ledecky
Katie Ledecky competes in a heat for the women's 800-meter freestyle at the 2016 U.S. Olympic Team Trials for Swimming at CenturyLink Center on July 1, 2016 in Omaha, Neb.

3) Ryan Lochte and Michael Phelps
(L-R) Michael Phelps and Ryan Lochte dive in to compete in the final heat for the men's 200-meter individual medley at the 2016 U.S. Olympic Team Trials for Swimming at CenturyLink Center on July 1, 2016 in Omaha, Neb.

4) Maya DiRado
Maya DiRado participates in the medal ceremony for the women's 200-meter individual medley during day four of the 2016 U.S. Olympic TeamTrials for Swimming at CenturyLink Center on June 29, 2016 in Omaha, Neb.

5) Nathan Adrian and Anthony Ervin
Nathan Adrian (R) and Anthony Ervin (L) celebrate after competing in the final heat for the men's 50-meter freestyle at the 2016 U.S. Olympic Team Trials for Swimming at CenturyLink Center on July 2, 2016 in Omaha, Neb.

6) Kelsi Worrell
Kelsi Worrell competes in a semifinal heat for the women's 100-meter butterfly at the 2016 U.S. Olympic Team Trials for Swimming at CenturyLink Center on June 26, 2016 in Omaha, Neb. 

7) Missy Franklin
Katie Ledecky (L) celebrates with Missy Franklin (R) after the final heat for the women's 200-meter freestyle at the 2016 U.S. Olympic Team Trials for Swimming at CenturyLink Center on June 29, 2016 in Omaha, Neb.

8) Lilly King
Lilly King competes in the final heat for the women's 200-meter breaststroke at the 2016 U.S. Olympic Team Trials for Swimming at CenturyLink Center on July 1, 2016 in Omaha, Neb.

9) Michael Phelps (again)
Michael Phelps (L) and Ryan Lochte compete in the final heat for the men's 200-meter individual medley at the 2016 U.S. Olympic Team Trials for Swimming at CenturyLink Center on July 1, 2016 in Omaha, Neb.

10) Tom Shields
Tom Shields and Ryan Lochte compete in the men's 100-meter butterfly at the 2016 U.S. Olympic Team Trials for Swimming at CenturyLink Center on July 1, 2016 in Omaha, Neb.

11) Amanda Weir
Amanda Weir dives in to compete in a semifinal heat for the women's 100-meter freestyle at the 2016 U.S. Olympic Team Trials for Swimming at CenturyLink Center on June 30, 2016 in Omaha, Neb.

12) Hali Flickinger
Cammile Adams (L) celebrates with Hali Flickinger after winning the final heat for the women's 200-meter butterfly at the 2016 U.S. Olympic Team Trials for Swimming at CenturyLink Center on June 30, 2016 in Omaha, Neb.

13) Micah Lawrence
Micah Lawrence competes in a semifinal heat for the women's 200-meter breaststroke at the 2016 U.S. Olympic Team Trials for Swimming at CenturyLink Center on June 30, 2016 in Omaha, Neb. 

14) Ryan Held
Ryan Held reacts after competing in a final heat for the men's 100-meter freestyle at the 2016 U.S. Olympic Team Trials for Swimming at CenturyLink Center on June 30, 2016 in Omaha, Neb.

15) ...and just one more time: Michael Phelps.
Michael Phelps  participates in the medal ceremony for the men's 100-meter butterfly at the 2016 U.S. Olympic Team Trials for Swimming at CenturyLink Center on July 2, 2016 in Omaha, Neb.